TWI534675B - Touch sensing device and driving method thereof - Google Patents

Touch sensing device and driving method thereof Download PDF

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Publication number
TWI534675B
TWI534675B TW103127123A TW103127123A TWI534675B TW I534675 B TWI534675 B TW I534675B TW 103127123 A TW103127123 A TW 103127123A TW 103127123 A TW103127123 A TW 103127123A TW I534675 B TWI534675 B TW I534675B
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TW
Taiwan
Prior art keywords
touch
sensor
line
level
signal
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Application number
TW103127123A
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Chinese (zh)
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TW201541310A (en
Inventor
鄭志炫
李得秀
金載昇
金泰潤
Original Assignee
Lg顯示器股份有限公司
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Priority to KR1020140050727A priority Critical patent/KR101633174B1/en
Priority to KR1020140051609A priority patent/KR20150125104A/en
Application filed by Lg顯示器股份有限公司 filed Critical Lg顯示器股份有限公司
Publication of TW201541310A publication Critical patent/TW201541310A/en
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Publication of TWI534675B publication Critical patent/TWI534675B/en

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Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416Control or interface arrangements specially adapted for digitisers
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3648Control of matrices with row and column drivers using an active matrix
    • G09G3/3655Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3685Details of drivers for data electrodes
    • G09G3/3688Details of drivers for data electrodes suitable for active matrices only
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3696Generation of voltages supplied to electrode drivers
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/02Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264Details of driving circuits
    • G09G2310/0297Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns

Description

Touch sensing device and driving method thereof

The present invention relates to a touch sensing device having a touch sensor embedded in a pixel array and a driving method thereof.

A user interface (UI) is configured to enable a user to communicate with various electronic devices so that the electronic device can be controlled simply and comfortably as they wish. Examples of the user interface include a keypad, a keyboard, a mouse, an on-screen display (OSD), and a remote controller having an infrared communication function or a radio frequency (RF) communication function. User interface technology is constantly evolving to improve user sensitivity and ease of processing. The user interface has been developed into a touch UI, a voice recognition UI, a three-dimensional (3D) UI, and the like.

The touch UI has been installed in a portable information device, such as a smart phone, and is widely used in notebook computers, computer monitors, home appliances, and the like. A technique of embedding a plurality of touch sensors in a pixel array of a display panel has recently been proposed (hereinafter referred to as "in-line touch sensor technology"). The in-cell touch sensor technology can mount the touch sensor into the display panel without increasing the thickness of the display panel. The touch sensors are connected to the pixels by parasitic capacitance. In the driving method thereof, in order to reduce mutual influence due to coupling between the pixel and the touch sensor, a period for driving the pixel (hereinafter referred to as "display driving period") and for driving the touch sensing The period of the device (hereinafter referred to as "the period during the touch sensor driving period") is separated in time.

The in-cell touch sensor technology utilizes an electrode connected to a pixel of the display panel as an electrode for a touch sensor. For example, the in-cell touch sensor technology may employ a method in which a common electrode is divided into a plurality of portions to apply a common voltage to pixels of the liquid crystal display device, and a plurality of portions of the common electrode are used as electrodes of the touch sensor. The same common voltage should be applied to All pixels; however, when the common electrode is divided into a plurality of portions for the touch sensor, the common voltage becomes inconsistent on the large screen, which may result in deterioration of image quality.

Referring to Figures 1 to 3, the common electrode COM is divided into inductors C1 to C4 by in-line touch sensor technology. The sensor lines L1 to L4 are connected to the inductors C1 to C4, respectively.

In the display driving period Td, the common voltage Vcom for the pixels is applied to the inductors C1 to C4 via the sensor lines L1 to L4. During the touch sensor driving period Tt, the sensor driving signal Tdrv is supplied to the inductors C1 to C4 via the sensor lines L1 to L4.

The lengths of the sensor lines L1 to L4 differ depending on the position of the touch sensor. The difference in length between the sensor lines L1 to L4 causes the delay time of the common voltage Vcom applied to the inductors C1 to C4 to vary with the position of the touch sensor, which causes inconsistent image quality.

For example, as shown in FIG. 3, the delay time of the common voltage Vcom applied to the first inductor C1 via the first inductor line L1 is greater than the common voltage Vcom applied to the fourth inductor C4 via the fourth inductor line L4. The delay is long. This is because the first inductor line L1 is longer than the fourth inductor line L4, which results in a longer resistor-capacitor RC delay. Therefore, even if the same voltage is applied to the first and fourth inductor lines L1 and L4, the first inductor C1 has a lower voltage than the fourth inductor C4. Due to the RC delay, the delay time of the sensor drive signal Tdrv also depends on the position of the touch sensor.

On the large screen display device, the difference in length between the sensor lines L1 to L4 is large. Therefore, on the large screen display device, the conventional in-cell touch sensor technology makes the common voltage Vcom applied by the inductors C1 to C4 during the display driving period inconsistent, which causes the image quality of the display device to be lowered.

Due to the coupling between the in-cell touch sensor and the pixel, the large screen display device has a larger parasitic capacitance than the smaller display device. This parasitic capacitance increases if the size and resolution of the touch screen is increased. This will result in reduced touch sensitivity and touch recognition accuracy. Therefore, in-cell touch sensor technology needs to be applied to the touch screen of a large screen display device to minimize the parasitic capacitance of the touch sensor.

An embodiment of the present invention provides a touch sensing device and a driving side thereof. The touch sensing device aligns a common voltage applied to a plurality of pixels in a display device including a plurality of in-cell touch sensors, and improves touch sensitivity and touch recognition accuracy.

In one embodiment, a touch sensing device includes: a plurality of signal lines connected to a plurality of pixels of the touch sensing device; a plurality of sensor lines connected to the plurality of touch sensors of the touch sensing device a first feeding unit that applies a common voltage to a first end of the line of the sensor during a display driving period of the touch sensing device and provides a touch during a driving period of the touch sensor Controlling the drive signal to the first end of the sensor lines; and a second feed unit applying the common voltage to a second end of the sensor lines during the display drive period to The control sensors are connected together.

The second feed unit insulates the sensor lines during the touch sensor drive cycle. In one embodiment, a driving method of a touch sensing device includes: connecting a plurality of sensor lines to apply a common voltage to one end and the other end of the sensor lines during a display driving period to a sensor line; and insulating the sensor lines and providing a touch drive signal to one end of the sensor lines during a touch sensor drive period.

In one embodiment, a touch sensing device includes a plurality of touch sensors formed in a column, the plurality of touch sensors including a first touch sensor and the first touch formed in the column A second touch sensor is disposed under the sensor; a first sensor line is coupled to the first touch sensor, the first sensor line has a first length and includes a first end and a first a second sensor line coupled to the second touch sensor, the second sensor line having a second length, the second length and the first length of the first sensor line Substantially identical, and the second sensor line includes a first end and a second end; a first component coupled to the first end of the first sensor line and the second sensor line a first end configured to provide a reference signal to the first end of the first sensor line and the first end of the second sensor line during a display drive period; and a second An element coupled to the second end of the first sensor line and the second sensor line Second end, the second element is configured to provide the reference signal during the display period to drive the second end and the second end of the second inductor is a first inductor wire line.

11‧‧‧pixel electrode

12‧‧‧Data Drive Circuit

13‧‧‧Multiplexer

14‧‧‧ brake drive circuit

20‧‧‧Time Controller

30‧‧‧Induction circuit

31‧‧‧First upper feed unit

32‧‧‧First lower feed unit

40‧‧‧Main system

50‧‧‧Power supply unit

50A‧‧‧First power supply unit

50B‧‧‧second power supply unit

51, 55‧‧‧ first multiplexer

52, 57‧‧‧ second multiplexer

53, 56‧‧‧ third multiplexer

54, 58‧‧‧ fourth multiplexer

61‧‧‧First feeding unit

62‧‧‧Second feed unit

100‧‧‧ display panel

101‧‧‧Substrate

102‧‧‧Pixel Array

103‧‧‧Bridge mode

104‧‧‧Path selection line

C1~C4‧‧‧ sensor

Clc‧‧‧ parasitic capacitance

Cm‧‧‧ mutual capacitance

COM‧‧‧Common electrode

D1‧‧‧ Feeding line

D2, D2a, D2b‧‧‧ feed control line

DE‧‧‧ data enable signal

FPC‧‧‧Flexible Printed Circuit

G1~Gn‧‧‧ brake line

GOE‧‧‧ gate output enable signal

GSP‧‧‧ brake start pulse

GSC‧‧‧ brake displacement clock

Hi-Z‧‧‧High impedance terminal

Hsync‧‧‧ horizontal sync signal

L1~Li‧‧‧ sensor line

M1~M4‧‧‧ potential

MCLK‧‧‧main clock

POL‧‧‧ polarity control signal

RGB‧‧‧ digital video material

Rx1~R7‧‧‧Rx line

S1~Sm‧‧‧ data line

SSC‧‧‧ source sampling clock

SOE‧‧‧ source output enable signal

T1, T2, T3‧‧‧TFT

Tdrv‧‧‧ sensor drive signal / touch drive signal

Td‧‧‧ display drive cycle

Ten‧‧‧ voltage

Tsync‧‧‧ sync signal

Tt‧‧‧ touch sensor drive cycle

Tx1~Tx6‧‧‧Tx line

Vcom, Vcom1, Vcom2‧‧‧ public voltage

Vsync‧‧‧ vertical sync signal

VGH‧‧‧ gate high voltage

VGL‧‧‧ gate low voltage

Vcc‧‧‧ logic supply voltage

Vm‧‧‧ modulation voltage

The drawings are used to provide a further understanding of the present invention and are incorporated in this specification to constitute a part of this specification. The accompanying drawings illustrate the embodiments of the invention, In the drawings: Figure 1 shows the view of the sensor line connected to the touch sensor; Figure 2 shows the common voltage and touch applied to the touch sensor according to the embedded touch sensor technology. The waveform diagram of the driving signal; FIG. 3 is a waveform diagram showing the delay time of the common voltage according to the position of the touch sensor according to the in-cell touch sensor technology; FIG. 4 is a schematic diagram according to an embodiment. A block diagram of a display device; FIGS. 5 and 6 are views illustrating a self-capacitive touch sensor according to an embodiment; and FIGS. 7-9 are diagrams showing pixel drive signals and touches provided to the display device Waveform diagram of the control driving signal; FIGS. 10A to 10C are waveform diagrams showing different examples of the touch driving signal; FIG. 11 is a circuit diagram showing the driving circuit of the display device according to an embodiment in detail; FIG. FIG. 13 is a waveform diagram showing a pixel driving signal and a touch driving signal outputted from the driving circuit of FIG. 11; FIG. 14 is an equivalent circuit diagram showing a mutual capacitance type touch sensor according to an embodiment; Figure to Figure 17 A view showing an example of connecting the doubly-fed device to the touch sensor of FIG. 14; and FIG. 18 is a waveform diagram showing signal waveforms applied to the mutual capacitance type touch sensor.

Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings. Throughout the specification, like reference numerals generally refer to like elements. In the following, detailed descriptions of related known functions or configurations that may unnecessarily obscure the inventive subject matter in the description of the present invention are omitted.

The display device may be implemented as a flat panel display device such as a liquid crystal display (LCD), a field emission display (FED), a plasma display panel (PDP), an organic light emitting display (OLED), or an electrophoresis (EPD). In the following exemplary embodiments, it should be noted that although the liquid crystal display The display device is described as an example of a flat panel display device, but the display device is not limited to a liquid crystal display device. For example, the display device can be any display device as long as it is applicable to in-cell touch sensor technology.

The touch sensing device has a plurality of touch sensors embedded in a pixel array. A common electrode for applying a common voltage to the pixels is divided into electrodes of the touch sensors. During the display driving period, the touch sensing device shorts the switching elements of the touch sensors by connecting the sensors, and applies a common voltage Vcom to the pixels through the connected sensors. During the driving process of the touch sensor, the touch sensing device insulates the touch sensors by turning off the switching elements, and provides touch driving signals to the touch sensors. During the period of the touch sensor period, in order to minimize the influence of the parasitic capacitance between the pixel and the touch sensor, an AC signal having the same phase as the touch driving signal is provided to the signal line connected to the pixel.

Although the common voltage applied to the pixels of the liquid crystal display device has been proposed as an example, the embodiments herein are not limited thereto. For example, the common voltage should be interpreted as a voltage that is commonly applied to the pixels of the flat panel display device, such as a high potential/low potential supply voltage (VDD/VSS) that is commonly applied to the pixels of the organic light emitting diode display device.

In an embodiment, the touch sensor refers to a capacitive touch sensor that can be implemented as a touch sensor. The touch sensor can be classified into a self-capacitance type touch sensor or a mutual capacitance type touch sensor.

When a finger touches the self-capacitive touch sensor, a capacitance appears. The sensing circuit can sense the touch position and the touch area by measuring the change in capacitance (or charge) caused by the contact of the self-capacitive touch sensor provided with the touch driving signal by the object.

The mutual capacitance type touch sensor utilizes mutual capacitance, which appears between a Tx line provided with a touch driving signal and an Rx line crossing the Tx lines, and has a dielectric layer (or insulating layer) interposed between the Tx lines. Between the Rx line. The touch drive signal is provided to the Tx line. The sensing circuit can sense the touch position and the touch area by receiving a change in the capacitance (or charge) of the touch sensor caused by the object contacting the touch sensor. The mutual capacitance type touch sensor can detect multi-touch input more accurately than the self-capacitance type touch sensor.

Fig. 4 is a block diagram schematically showing a display device according to an embodiment.

Referring to Figure 4, the display device includes a touch sensing device. The touch sensing device The touch input is sensed by using a touch sensor embedded in the display panel 100. The touch sensor can be implemented by the self-capacitance type sensor shown in FIGS. 5 and 6, or by the mutual capacitance type sensor shown in FIGS. 14 to 17.

In the liquid crystal display device, a liquid crystal layer is formed between the two substrates of the display panel 100. The liquid crystal molecules of the liquid crystal layer are driven by an electric field which is generated by a potential difference between a data voltage applied to the pixel electrode and a common voltage Vcom applied to the common electrode. The pixel array of the display panel 100 includes a plurality of pixels defined by the data lines S1 to Sm (m is a positive integer greater than or equal to 2) and the gate lines G1 to Gn (n is a positive integer greater than or equal to 2) a plurality of touch sensors for which the common electrode connected to the pixels is divided into a plurality of portions; a plurality of sensor lines L1 to Li, the sensor lines being connected to the touches An inductor; and a plurality of switching elements (omitted in FIG. 4) connected to the inductor lines L1 to Li (i is a positive integer greater than 0 and less than m).

The sensor lines L1 to Li are equal in length in the pixel array (or screen). For example, the touch sensors C1 to C4 are formed in one column as shown in FIG. The second touch sensor C2 is formed in the column below the first touch sensor C1. The first sensor line L1 is coupled to the first touch sensor C1. The second sensor line L2 is coupled to the second touch sensor C2. The second inductor line L2 has substantially the same length as the length of the first inductor line L1. The first inductor line L1 includes a first portion and a second portion. The first portion of the first sensor line L1 includes a connection point connected to the first touch sensor C1 and a first end coupled to the first sensor line L1 of the first feed unit. The second portion of the first sensor line L1 includes a connection point connected to the first touch sensor and a second end coupled to the first sensor line L1 of the second feed unit. The second inductor line L2 includes a first portion and a second portion. The first portion of the second sensor line L2 includes a connection point connected to the second touch sensor C2 and a first end coupled to the second sensor line L2 of the first feed unit. The second portion of the second sensor line L2 includes a connection point connected to the second touch sensor C2 and a second end coupled to the second sensor line L2 of the second feed unit. The first portion of the first inductor line L1 is longer than the first portion of the second inductor line L2, and the second portion of the first inductor line L1 is shorter than the second portion of the second inductor line L2. In the display driving period Td, the common voltage Vcom is applied to the inductor through both ends of the inductor lines L1 to Li. The common voltage Vcom can be represented as a reference signal for the pixels.

Each pixel includes a plurality of pixel TFTs (thin film transistors, Figure 11 T3), the pixel TFTs are formed at intersections of the data lines S1 to Sm and the gate lines G1 to Gn; a pixel electrode for receiving a data voltage through the pixel TFT T3; a common electrode for the common electrode A common voltage Vcom is received; and a storage capacitor Cst is connected to the pixel electrode to maintain the voltage of the liquid crystal cell. The common electrode is divided into portions for a plurality of touch sensors during a touch sensor drive period.

A black matrix, a plurality of color filters, and the like may be formed on the upper substrate of the display panel 100. The lower substrate of the display panel 100 may be implemented to have a COT (Color Filter on TFT) structure. In this case, the color filters may be formed on the lower substrate of the display panel 100. The polarizer may be attached to the upper substrate and the lower substrate of the display panel 100, and an alignment film for setting a liquid crystal pretilt angle is formed on the inner surface contacting the liquid crystal. A column spacer for maintaining a cell gap of the liquid crystal layer is formed between the upper substrate and the lower substrate of the display panel 100.

A backlight unit may be disposed under the back surface of the display panel 100. The backlight unit is implemented as an edge type backlight unit or a direct type backlight unit to illuminate the display panel 100. The display panel 100 can be implemented in any well-known liquid crystal mode, such as TN (Twisted Nematic) mode, VA (Vertical Alignment) mode, IPS (In-Plane Switching) mode, and FFS (Fringe Field). Switching; edge field conversion mode. A self-luminous display device such as an organic light emitting diode display device does not require a backlight unit.

The display device further includes display drive circuits 12, 14 and 20 for writing input image data to pixels, a sensing circuit 30 for driving the touch sensor, and a power supply unit 50 for generating electric power.

The display drive circuits 12, 14 and 20 and the induction circuit 30 are synchronized with each other in response to the synchronization signal Tsync. The display driving period period Td is temporally separated from the touch sensor driving period period Tt as shown in FIG.

The display drive circuits 12, 14 and 20 write data to the pixels during the display drive period (Td of FIG. 2). The pixel TFT T3 is turned off during the touch sensor driving period (Tt of FIG. 2), and the data voltage loaded into the pixel during the display driving period Td is held. The display driving circuits 12, 14 and 20 can supply AC signals having the same phase as the touch driving signals Tdrv supplied to the touch sensors via the sensor lines L1 to Li to the signal lines S1 to Sm and G1 to Gm so as to be Minimizing the parasitic sensor between the touch sensor and the signal lines S1 to Sm and G1 to Gn connected to the pixel during the touch sensor driving period Tt capacitance. The signal line connected to the pixel is a signal line for writing data to the pixel, and includes data lines S1 to Sm for applying a data voltage to the pixel and for applying a gate pulse (or a scan pulse) to select a data write. Gate lines G1 to Gm of pixels.

The display drive circuits 12, 14 and 20 include a data drive circuit 12, a gate drive circuit 14, and a timing controller 20. During the display driving period Td, the data driving circuit 12 converts the digital video material RGB of the input image received from the timing controller 20 into an analog positive/negative gamma compensation voltage, and outputs the data voltage. The material voltage output from the data driving circuit 12 is applied to the data lines S1 to Sm. The data driving circuit 12 supplies an AC signal having the same phase as the touch driving signal Tdrv supplied to the touch sensor during the touch sensor driving period Tt to the data lines S1 to Sm to minimize the touch sensor and Parasitic capacitance between data lines. This is because the voltage across the parasitic capacitance changes at the same time, and the smaller the voltage difference, the less the amount of charge stored in the parasitic capacitance. On the other hand, since one end of the touch sensor is connected to the sensor and the other end is connected to the GND, when the touch driving signal Tdrv is supplied to the touch sensor, the touch sensor is charged.

In the display driving period Td, the gate driving circuit 14 sequentially applies a gate pulse (or a scan pulse) synchronized with the material voltage to the gate lines G1 to Gn, and selects a line of the display panel 100 to which the material voltage is written. The gate pulse swings between the gate high voltage VGH and the gate low voltage VGL. The gate pulse is applied to the gate of the pixel TFT T3 via the gate lines G1 to Gn. The gate high voltage VGH is set to a voltage higher than the threshold voltage of the pixel TFT T3, and turns on the pixel TFT T3. The gate low voltage VGL is a voltage lower than the threshold voltage of the pixel TFT T3. The gate driving circuit 14 supplies an AC signal having the same phase as the touch driving signal Tdrv supplied to the touch sensor during the touch sensor driving period Tt to the gate lines G1 to Gu to minimize the touch sensor and Parasitic capacitance between the gate lines. The voltage of the AC signal applied to the gate lines G1 to Gn during the touch sensor driving period Tt should be lower than the gate voltage VGH and the threshold voltage of the pixel TFT T3 as shown in FIGS. 12 and 13 to avoid The data written to the pixel changes.

The timing controller 20 receives timing signals such as a vertical synchronizing signal Vsync, a horizontal synchronizing signal Hsync, a data enable signal DE, and a main clock MCLK from the main system 40, and synchronizes the operation times of the data driving circuit 12 and the gate driving circuit 14. The scan timing control signal includes a gate start pulse GSP, a gate shift clock GSC, a gate output enable signal GOE, and the like. The data timing control signal includes a source sampling clock SSC, a polarity control signal POL, and a source output enable signal. SOE and so on.

The main system 40 can be implemented as any of the following: a television system, a set top box, a navigation system, a DVD player, a Blu-ray player, a personal computer PC, a home theater system, and a telephone system. The main system 40 includes a system single chip (SoC) having a scaler therein and converts the digital video material of the input image into a format suitable for the resolution of the display panel 100. The main system 40 transmits the digital video data RGB of the input image and the timing signals Vsync, Hsync, DE, and MCLK to the timing controller 20. Further, the main system 40 executes an application associated with the coordinate information XY from the touch input of the sensing circuit 30.

The timing controller 20 or the main system 40 can generate a synchronization signal Tsync for synchronizing the display drive circuits 12, 14 and 20 with the sensing circuit.

The common voltage Vcom is applied to the pixels via the touch sensor during the display driving period Td. The touch sensor is short-circuited by the switching element T1, the feed line D1, the feed control line D2, and the sensor lines L1 to L4. Once the touch sensor is shorted, the common voltage Vcom is applied simultaneously in both directions of the sensor lines L1 to L4.

The sensing circuit 30 compares the capacitance change of the touch sensor with a predetermined threshold during the touch sensor driving period Tt, detects the touch input if the capacitance change is greater than the threshold, and senses the touch input position and the touch area. The sensing circuit 30 calculates the coordinate information XY of the touch input and transmits it to the main system 40.

The data driving circuit 12 and the sensing circuit 30 can be integrated into a single IC (Integrated Circuit), as shown in FIG. 5 and FIG. 11, and combined in a COG (Chip on Glass) process. On the substrate of the display panel.

The power supply unit 50 applies the common voltage Vcom to one of the inductor lines L1 to Li during the display driving period Td. The power supply unit 50 generates a voltage required for the feed line D1 of the fifth figure of the double feed common voltage Vcom and the feed control line D2. The power supply unit 50 generates an AC signal during the touch sensor driving period Tt, which has the same phase as the touch driving signal Tdrv.

5 and 6 are views illustrating a self-capacitive touch sensor according to an embodiment. In FIGS. 5 and 6, reference numeral "11" denotes a pixel electrode of a pixel, and reference numeral "101" denotes a substrate of the display panel 100. The reference digit "102" indicates an array of pixels displaying the input image. The outer portion of the pixel array 102 on the display panel 100 is a non-display area, ie, an edge frame.

Referring to Figures 5 and 6, the common electrode COM is divided into a plurality of inductors C1 to C4. The sensor lines L1 to L4 are connected to the sensors C1 to C4 of the touch sensors on a one-to-one basis. Therefore, each sensor line is connected to the corresponding sensor. For example, the sensor line L1 is connected to the sensor C1, the sensor line L2 is connected to the sensor C2, and so on. Each self-capacitive touch sensor includes a capacitor connected to the sensor electrodes.

Each of the inductors C1 to C4 is patterned to be larger in size than the pixel and connected to a plurality of pixels. Each of the inductors C1 to C4 may be formed of a transparent conductive material such as ITO (Indium Tin Oxide). The inductor lines L1 to L4 may be formed of a low resistance metal such as copper (Cu), aluminum lanthanum (AlNd), molybdenum (Mo), or titanium (Ti). The inductors C1 to C4 are common electrodes that are connected together to apply a common voltage Vcom to the pixels during the display driving period Td. The sensors C1 to C4 are insulated from each other during the touch sensor driving period Tt. Therefore, the self-capacitive touch sensors are insulated from each other and independently driven during the touch sensor driving period Tt.

In an embodiment, the display device includes a doubly-fed device for connecting the inductors C1 to C4 and applying a common voltage Vcom to the inductors C1 to C4 during the display driving period Td. The doubly-fed device applies a common voltage across the inductor lines L1 to L4 to reduce the delay of the common voltage applied to the inductors C1 to C4 and to make the common voltage of the pixels uniform across the screen.

The doubly-fed device includes a first feeding unit for applying a common voltage Vcom to one of the sensor lines L1 to L4 during a display driving period Td, and a second feeding unit for making a period during the display driving period Td The inductor lines L1 to L4 are connected to each other via the feed line D1 and the common voltage Vcom is applied to the other ends of the sensor lines L1 to L4. Since the sensor lines L1 to L4 are connected via the feed line D1 during the display driving period Td, the touch sensor is short-circuited.

The first feeding unit supplies the touch driving signal to the touch sensor via the sensor lines L1 to L4 during the touch sensor driving period Tt. The second feeding unit insulates the sensor lines from each other during the touch sensor driving period Tt and independently drives each of the touch sensors.

The first feeding unit and the second feeding unit are located opposite to each other, and the sensor lines L1 to L4 are interposed between the first feeding unit and the second feeding unit. The first feed The unit may be an IC connected to the lower end of the sensor lines L1 to L4 of FIG. 5, and the second feeding unit may be connected to, but not limited to, the upper ends connected to the feeder lines L1 to L4. For example, if the sensor lines L1 to L4 are formed in the lateral direction, the first feeding unit and the second feeding unit may be placed on the left and right sides of the display panel 100 with the sensor lines L1 to L4 interposed therebetween. Between the unit and the second feed unit.

The second feeding unit includes a TFT T1 and a feeding control line D2 connected to the TFT T1, wherein each of the TFTs T1 is connected to a corresponding sensor line of the sensor lines L1 to L4 and a feeding line D1. The TFT T1 has the same structure and size as the pixel TFT T3, and is formed simultaneously with the pixel TFT T3. The TFT T1 has a gate connected to the feed control line D2, a drain connected to the feed line D1, and a source connected to the inductor lines L1 to L4, respectively. Therefore, the TFT T1 selectively connects the feed line D1 and the sensor lines in response to the voltage of the feed control line D2.

The feed line D1 and the feed control line D2 are low resistance metal lines which are formed along the bezel area outside the pixel array 102. The power supply unit 50 applies the common voltage Vcom to the feed line D1 and the gate high voltage VGH via the feed control line D2 during the display drive period Td to turn on the TFT T1. Therefore, the TFT T1 applies the common voltage Vcom from the feed line D1 to the inductor lines L1 to L4 in response to the gate high voltage VGH applied through the feed control line D2 during the display drive period Td.

The TFT T1 is kept in the off state during the touch sensor driving period Tt. An AC signal having the same phase as the touch driving signal Tdrv can be supplied to the gate and drain of the TFT T1 to minimize the parasitic capacitance between the TFT T1 and the inductor lines L1 to L4. In the touch sensor driving period Tt, the feed line D1 and the feed control line D2 can be controlled as shown in FIGS. 7 to 9. This will be described below in conjunction with Figs. 7 to 9.

The feed line D1 and the feed control line D2 may be controlled to pass through the flexible printed circuit (FPC) to the power supply unit 50.

7 to 9 are waveform diagrams showing pixel driving signals and touch driving signals supplied to the display device. In FIGS. 7 to 9, "Ten" represents the voltage of the feed control line D2, and "Vcom" represents the voltage of the feed line D1.

Referring to FIG. 7, the display driving period Td and the touch sensor driving period period Tt are separated in time.

The input image data is written to the pixels during the display drive period Td. in During the display driving period Td, the data voltage of the input image is applied to the data lines S1 and S2, and the gate pulses synchronized with the data voltage are sequentially applied to the scanning lines G1 and G2. The common voltage Vcom is applied to the interconnected inductors C1 to C4 through the ends of the sensor lines L1 to L4 during the display driving period Td. In the display driving period Td, the gate high voltage VGH higher than the threshold voltage of the TFT T1 is applied to the feed control line D2, and the common voltage Vcom is applied to the feed line D1. Therefore, the common voltage Vcom is applied to both ends of the inductor lines L1 to L4 via the IC and the TFT T1. When the common voltage Vcom is applied to the inductors C1 to C4 via the sensor lines L1 to L4, the voltage drop across the inductors C1 to C4 can be prevented. This makes the common voltage Vcom applied to the pixels on the large screen uniform, thereby improving the image quality.

The data voltage loaded in the pixel is held during the touch sensor driving period Tt. This is because the pixel TFT T3 and the TFT T1 of the second feeding unit are kept in the off state during the touch sensor driving period Tt.

The power supply unit 50 can generate a voltage applied to the touch driving signals Tdrv of the inductors C1 to C4 during the touch sensor driving period Tt. The output of the power supply unit 50 is disconnected from the feed line D1 and the feed control line D2 during the touch sensor drive period Tt. Therefore, the feed line D1 and the feed control line D2 can be maintained in a high impedance (Hi-Z) state without voltage application during the touch sensor driving period Tt. The TFT T1 is kept in the off state during the touch sensor driving period Tt because the feed line D1 and the feed control line D2 are maintained at a high impedance (Hi-Z).

The power supply unit 50 generates an AC signal having the same phase as the touch driving signal Tdrv during the touch sensor driving period Tt to minimize the sensor lines L1 to L4 and the signal lines S1, S2, G1, and G2 connected to the pixels. Parasitic capacitance between. In order to minimize the parasitic capacitance, the voltage of the AC signal can be set equal to the voltage of the touch drive signal Tdrv.

Referring to Fig. 8, the method of driving the pixel and the touch sensor in the display driving period Td is substantially the same as the method of the exemplary embodiment of Fig. 7, and a detailed description thereof will be omitted.

The data voltage loaded in the pixel is held during the touch sensor driving period Tt. This is because the pixel TFT T3 and the TFT T1 of the second feeding unit are kept in the off state during the touch sensor driving period Tt. The feed line D1 is maintained in a high impedance state during the touch sensor drive period Tt. Feed control line D2 during touch sensor drive period Tt The middle is held at the gate low voltage VGL, and the gate low voltage VGL is lower than the threshold voltage of the TFT T1.

The power supply unit 50 generates a voltage applied to the touch driving signals Tdrv of the sensors C1 to C4 during the touch sensor driving period Tt. The power supply unit 50 generates an AC signal having the same phase as the touch driving signal Tdrv during the touch sensor driving period Tt to minimize the sensor lines L1 to L4 and the signal lines S1, S2, G1, and G2 connected to the pixels. Parasitic capacitance between. In order to minimize the parasitic capacitance, the voltage of the AC signal can be set equal to the voltage of the touch drive signal Tdrv.

Referring to FIG. 9, the method of driving the pixel and the touch sensor in the display driving period Td is substantially the same as the method of the exemplary embodiment of FIG. 7, and a detailed description thereof will be omitted.

The data voltage loaded in the pixel is held during the touch sensor driving period Tt. This is because the pixel TFT T3 and the TFT T1 of the second feeding unit are kept in the off state during the touch sensor driving period Tt.

The voltage of the AC signal applied to the pixel signal lines S1, S2, G1, G2 and the sensor lines L1 to L4 and the touch driving signal Tdrv during the touch sensor driving period Tt should be lower than the gate high voltage VGH and the pixel TFT The threshold voltage of T3 prevents the data written to the pixel from changing.

The power supply unit 50 generates a voltage applied to the touch driving signals Tdrv of the sensors C1 to C4 during the touch sensor driving period Tt. The power supply unit 50 generates an AC signal having the same phase as the touch driving signal Tdrv during the touch sensor driving period Tt to minimize the sensor lines L1 to L4 and the signal lines S1, S2, G1, and G2 connected to the pixels. The parasitic capacitance between them, the parasitic capacitance between the inductor lines L1 to L4 and the feed line D1, and the parasitic capacitance between the inductor lines L1 to L4 and the feed control line D2. In order to minimize the parasitic capacitance, the voltage of the AC signal can be set equal to the voltage of the touch drive signal Tdrv. The AC signal is supplied to the sensor lines L1 to L4, the signal lines S1, S2, G1 and G2 connected to the pixels, the feed line D1, and the feed control line D2 during the touch sensor driving period Tt. The voltage of the touch driving signal Tdrv and the voltage of the AC signal having the same phase as the touch driving signal Tdrv are lower than the threshold voltage of the TFT T1. Therefore, the TFT T1 is kept in the off state during the touch sensor driving period Tt.

10A to 10C are different examples showing the touch driving signal Tdrv Waveform.

The touch drive signal Tdrv can have various waveforms and voltages in consideration of the size, resolution, and RC delay of the display panel. For example, if the RC delay is long, the voltage drop is taken into consideration, and thus the voltage of the touch driving signal Tdrv is preferably set to be high. In FIG. 10C, M1 to M3 (M1>M2>M3>M4) are voltages of the touch driving signal Tdrv. The touch driving signal Tdrv may have a multi-order waveform as shown in FIG. 10C. M1 is a potential for charging the touch sensor in a short time, and M3 is a potential for quickly removing residual charge from the touch sensor. The touch drive signal Tdrv shown in FIG. 10C may have a multi-order waveform as set forth in U.S. Patent Application Serial No. 14/079,798, the disclosure of which is incorporated herein by reference. The touch driving signal Tdrv shown in FIG. 10C has a high potential M1 and is gradually lowered to an intermediate potential M2 smaller than M1. The touch drive signal is then turned to a low potential M3 that is less than the potential M2. The touch driving signal Tdrv is then turned to an intermediate potential M4 that is greater than the potential M3 and smaller than the intermediate potential M2. The AC signal having the same phase as the touch driving signal Tdrv may also have various waveforms as shown in FIG. 10C. For example, FIG. 10A illustrates a touch drive signal Tdrv having a multi-order waveform having a high potential M2 and a low potential M4. The touch driving signal Tdrv is switched from the intermediate potential M2 to the intermediate potential M4. In the embodiment of FIG. 10A, the potential M2 is the high potential of the touch driving signal Tdrv, and the potential M4 is the low potential of the touch driving signal Tdrv. In other words, the touch driving signal as shown in FIG. 10A is a multi-order waveform that is rotated from the first level to a second level greater than the first level, and then from the second level to the first level. The level is then switched from the first level to a third level that is less than the first level and then from the third level to the first level. FIG. 10B illustrates a touch drive signal Tdrv having a multi-order waveform having a high potential M1 and a low potential M3. The touch driving signal shown in FIG. 10C is a multi-order waveform that is rotated from the first level to the second level M1 that is greater than the first level, and then turns from the second level M1 to less than the second level. The second level M1 and the third level M2 greater than the first level, then transition from the third level M2 to the first level, and then from the first level to the fourth level M3 that is less than the first level Then, it is switched from the fourth level M3 to the fifth level M4 which is larger than the fourth level M3 and smaller than the first level, and then goes from the fifth level M4 to the first level. The touch driving signal Tdrv is switched from the high potential M1 to the low potential M3. The AC signal may have the same phase, the same voltage, and the same waveform as the touch driving signal Tdrv, as shown in FIGS. 7 to 9 , 12 , and 13 .

Figure 11 is a diagram showing in detail the power of the driving circuit of the display device according to an embodiment. Road map. Fig. 12 and Fig. 13 are waveform diagrams showing the pixel drive signal and the touch drive signal output from the drive circuit of Fig. 11.

Referring to FIGS. 11 to 13, the power supply unit 50 generates common voltages Vcom1 and Vcom2, a logic power supply voltage Vcc, gate high voltages VGH1 and VGH2, gate low voltages VGL1 and VGL2, AC signal voltages M1 to M4, and the like. The logic supply voltage Vcc is the drive voltage of the gate drive circuit 14 and the IC.

The first common voltage Vcom1 is applied to one of the inductor lines L1 to L4 via the first upper feeding unit 31 and the first lower feeding unit 32 in the IC. The second common voltage Vcom2 is applied to the other ends of the inductor lines L1 to L4 via the second feeding units D1, D2, and T1. If the load connected to the second feeding units D1, D2, and T1 is greater than the load connected to the first upper feeding unit 31 and the first lower feeding unit 32, the second common voltage Vcom2 is preferably set higher than the first common voltage Vcom1 . If the load difference is small, the first common voltage Vcom1 and the second common voltage Vcom2 may be set to be equal in potential.

The first gate high voltage VGH1 and the first gate low voltage VGL1 are applied to the gate lines G1 and G2 via the gate driving circuit 14. Due to the parasitic capacitance Clc between the liquid crystal cell and the pixel TFT T3, a hopping voltage can be generated, causing flicker. By reducing the first gate high voltage VGH1 at the falling edge of the gate pulse, the trip voltage can be reduced, so that flicker can be reduced. As shown in FIGS. 12 and 13, the first gate high voltage VGH1 is turned to a predetermined modulation voltage Vm before being turned to the first gate low voltage VGL1.

The gate driving circuit 14 applies a gate pulse that swings between the first gate high voltage VGH1 and the first gate low voltage VGL1 to the gate lines G1 and G2 during the display driving period Td. The gate driving circuit 14 supplies an AC signal to the gate lines G1 and G2 in synchronization with the touch driving signal Tdrv during the touch sensor driving period Tt. The AC signal has the same phase as the touch drive signal Tdrv and is synchronized therewith.

The gate drive circuit 14 sequentially shifts the output of the shift register. The shift register responds to the gate start pulse GSP and the gate displacement clock GSC output gate pulse and shifts the output. The AC signal output from the power supply unit 50 and the gate shift clock GSC are input to the shift register.

The second gate high voltage VGH2 and the second gate low voltage VGL2 are applied to the feed control line D2. If the load connected to the second feeding units D1, D2, and T1 is greater than the load connected to the gate driving circuit 14, the second gate high voltage VGH2 is set higher than the first gate high voltage VGH1. If the load connected to the second feeding units D1, D2, and T1 is greater than the load connected to the gate driving circuit 14, the second gate low voltage VGL2 is set lower than the first gate low voltage VGL1. If the load difference is small, the first gate high voltage VGH1 and the second gate high voltage VGH2 can be set to be equal in potential, and the first gate low voltage VGL1 and the second gate low voltage VGL2 can be set to be equal in potential.

The power supply unit 50 can be divided into a first power supply unit 50A and a second power supply unit 50B. The first power supply unit 50A supplies a voltage required to drive the IC and the gate drive circuit 14. The second power supply unit 50B provides a voltage required to drive the second feeding unit 62.

The first power supply unit 50A includes a plurality of multiplexers 51, 52, 53, and 54. The first multiplexer 51 selects the first gate low voltage VGL1 and the AC signal voltages M1 to M4 output from the second multiplexer 52 in response to the first selection signal, and applies it to the gate driving circuit 14. The second multiplexer 52 selects and outputs the AC signal voltages M1 to M4 in accordance with the predetermined AC signal waveform in response to the second selection signal. The first gate high voltage VGH1 is directly applied to the gate driving circuit 14.

The third multiplexer 53 applies the AC signal voltages M1 to M4 to the second multiplexer of the first upper feeding unit 31 and the first lower feeding unit 32 during the touch sensor driving period Tt in response to the third selection. signal. The fourth multiplexer 54 applies the AC signal voltages M1 to M4 to the multiplexer 13 connected to the data lines S1 and S2 during the touch sensor driving period Tt in response to the fourth selection signal.

The IC includes a data driving circuit 12, a sensing circuit 30, a first upper feeding unit 31 and a first lower feeding unit 32, and a multiplexer 13.

The first multiplexer and the first lower feed unit 32 of the first upper feed unit 31 include an output connected to the inductor lines L1 to L4 and an input connected to the second multiplexer and the induction circuit 30. The first multiplexer applies a first common voltage Vcom1 input through the second multiplexer to the sensor lines L1 to L4 during the display driving period Td in response to the fifth selection signal. The first multiplexer applies AC signal voltages M1 to M4 input through the second multiplexer to the sensor lines L1 to L4 during the touch sensor driving period Tt, and connects the sensor lines L1 to L4 To the sensing circuit 30. The sensing circuit 30 senses a change in capacitance according to a count of signal changes across the sensor lines L1 to L4 during the touch sensor driving period Tt.

The second multiplexer includes an output coupled to the first multiplexer and an input coupled to the first power supply unit 50A. The second multiplexer will be in the display drive period Td The first common voltage Vcom1 is applied to the first multiplexer in response to the sixth selection signal, and then the AC signal voltages M1 to M4 are applied to the first multiplexer during the touch sensor driving period Tt.

The multiplexers 13 respectively include an output terminal connected to the data lines S1 and S2 and an input terminal connected to the data driving circuit 12 and the first power supply unit 50A. The multiplexer 13 applies the data voltage of the input image to the data lines S1 and S2 during the display driving period Td in response to the seventh selection signal, and then applies the AC signal voltages M1 to M4 during the touch sensor driving period Tt. Applied to data lines S1 and S2.

The second power supply unit 50B includes first to fourth multiplexers 55, 56, 57, and 58.

The first multiplexer 55 includes an output connected to the feed control line D2 and an input connected to the second multiplexer 57. The first multiplexer 55 applies the second gate high voltage VGH2 to the feed control line D2 during the display drive period Td in response to the eighth selection signal. In order to implement the driving method of FIGS. 7 to 9, the first multiplexer 55 connects the output of the high-impedance terminal Hi-Z or the second multiplexer 57 to the feed control during the touch sensor driving period Tt. Line D2 is responsive to the eighth selection signal or the second gate low voltage VGL2 is applied to the feed control line D2.

The second multiplexer 57 includes an output connected to the first multiplexer 55 and an input for applying AC signal voltages M1 to M4. The second multiplexer 57 applies AC signal voltages M1 to M4 during the touch sensor driving period Tt in response to the ninth selection signal.

The third multiplexer 56 includes an output connected to the feed line D1 and an input connected to the fourth multiplexer 58. The third multiplexer 56 applies the second common voltage Vcom2 to the feed line D1 during the display drive period Td in response to the tenth selection signal. In order to implement the driving method of FIGS. 7 to 9, the third multiplexer 56 connects the output of the high-impedance terminal Hi-Z or the fourth multiplexer 58 to the feed control during the touch sensor driving period Tt. Line D2, in response to the tenth selection signal.

The fourth multiplexer 58 includes an output coupled to the third multiplexer 56 and an input for applying AC signal voltages M1 through M4. The fourth multiplexer 58 applies AC signal voltages M1 to M4 during the touch sensor driving period Tt in response to the eleventh selection signal.

Timing controller 20 or MCU of the sensing circuit 30 (Micro controller) Unit, microcontroller) is capable of generating selection signals for controlling multiplexers 51 to 58, 13, 31 and 32.

FIG. 14 is an equivalent circuit diagram showing a mutual capacitance type touch sensor according to an embodiment. 15 to 17 are views showing an example of connecting a doubly-fed device to the touch sensor of Fig. 14.

Referring to FIGS. 14 to 17, the mutual capacitance Cm of the touch sensor appears between the Tx lines Tx1 to Tx6 and the Rx lines Rx1 to R7. The Tx lines Tx1 to Tx6 are orthogonal to the Rx lines Rx1 to R7.

The Tx lines Tx1 to Tx6 and the Rx lines Rx1 to R7 are distributed from the common electrode COM for applying the common voltage Vcom. Each of the Tx lines Tx1 to Tx6 is formed by connecting sensors adjacent in the lateral direction (x-axis). The Rx lines Rx1 to R7 are formed longitudinally along the longitudinal direction (y-axis) so as to be orthogonal to the Tx lines Tx1 to Tx6. The inductors of the Tx lines adjacent in the lateral direction may be connected by path selection lines 104 formed in the bezel area outside the pixel array 102, as shown in FIGS. 15 and 17, or in the bridge mode in the pixel array 102. 103 connections, as shown in Figure 16. In the bridge mode 103, the inductors of the Tx lines are separated from each other by the Rx lines Rx1 to R7, and the inductors of the Tx lines are connected by an insulating layer.

During the touch sensor driving period Tt, an AC signal having the same phase as the control driving signal Tdrv is supplied to the signal lines S1, S2, G1, and G2 connected to the pixel and the Rx line, thereby minimizing the touch sensor. Parasitic capacitance. Likewise, in the touch sensor driving period Tt, an AC signal having the same phase as the touch driving signal Tdrv can be supplied to the feeding line D1 and the feeding control line D2.

Since there must be a potential difference between the Tx line and the Rx line to charge the mutual capacitance Cm, the AC signal applied to the Rx line should have the same phase and a lower voltage than the touch drive signal Tdrv. Therefore, the voltage Vtx of the touch driving signal Tdrv should be higher than the voltages Vac1 and Vac2 of the AC signals applied to the pixel signal lines DL and GL and the Rx line, as shown in FIG.

The voltages Vac1 and Vac2 of the AC signals applied to the pixel signal lines S1, S2, G1 and G2, the sensor lines L1 to L4, and the Rx lines during the touch sensor driving period Tt and the voltage Vtx of the touch driving signal Tdrv It should be lower than the gate high voltage VGH and the threshold voltage of the pixel TFT T3 to avoid data changes written to the pixel.

The doubly-fed device applies the common voltage Vcom during the display driving period Td The two ends of the Tx lines Tx1 to Tx6 and the Rx lines Rx1 to R7 are applied, and then the touch driving signals Tdrv are supplied to the Tx lines Tx1 to Tx6 during the touch sensor driving period Tt. The sensing circuit 30 measures a change in the amount of charge received by the Rx lines Rx1 to Rx7 in synchronization with the touch driving signal Tdrv, compares the change in the amount of charge with a predetermined threshold, and detects the touch output if the change in the amount of charge is greater than the threshold. And calculate the coordinates.

The power supply unit 50 generates a voltage required for feeding the feed line D1 of the common voltage Vcom and feeding the control line D2. The power supply unit 50 generates a voltage such as a gate high voltage VGH, a gate low voltage VGL, a gamma reference voltage, and a logic power supply voltage Vcc. The analog positive/negative gamma compensation voltage is separated from the gamma reference voltage. The power supply unit 50 generates an AC signal having the same phase as the touch driving signal Tdrv during the touch sensor driving period Tt.

The doubly-fed device includes a first feeding unit for applying a common voltage Vcom to one ends of the inductor lines L1 to L4, and for connecting the inductor lines L1 to L4 to each other through the feeding line D1 and applying a common voltage Vcom to the inductor The second feeding unit 62 at the other end of the line L1 to L4. Since the sensor lines L1 to L4 are connected through the feed line D1 during the display drive period Td, the sensor lines L1 to L4 are short-circuited.

The first feeding unit 61 supplies the touch driving signal Tdrv to the Tx line through the sensor lines L1 to L4 during the touch sensor driving period Tt. The second feeding unit 62 insulates the inductor lines from each other during the touch sensor driving period Tt to disconnect the Tx line and the Rx line.

The first feeding unit 61 and the second feeding unit 62 are located opposite to each other, and the sensor lines L1 to L4 are interposed between the first feeding unit 61 and the second feeding unit 62. The sensor lines L1 to L4 are connected to the inductor of the Tx line. The second feeding unit 62 includes a first TFT T1 connected to the inductor lines L1 to L4, a second TFT T2 connected to the Rx line, and a feed line D1 connected to the TFTs T1 and T2, and feed control lines D2, D2a, and D2b.

The TFTs T1 and T2 have the same structure and size as the pixel TFT T3, and are formed simultaneously with the pixel TFT T3. The first TFT T1 has a gate connected to the feed control lines D2 and D2a, a drain connected to the feed line D1, and a source connected to the inductor line, respectively. Therefore, the first TFT T1 selectively connects the feed line D1 and the inductor line in response to the voltage of the feed control line D2b.

The second TFT T2 has a gate connected to the feed control line D2a, a drain connected to the feed line D1, and a source connected to the Rx line, respectively. Therefore, the second TFT T2 is selective The feed line D1 and the Rx line are connected in response to the voltage of the feed control line D2a. As shown in Fig. 17, in consideration of the difference between the load connected to the Tx line and the load connected to the Rx line, the first TFT T1 and the second TFT T2 can be individually controlled to change the feed time and the feed voltage.

The TFTs T1 and T2 remain in the off state during the touch sensor driving period Tt. An AC signal having the same phase as the touch driving signal Tdrv can be supplied to the gates and drains of the TFTs T1 and T2 through the feed line D1 and the feed control lines D2, D2a, and D2b to minimize the TFTs T1 and T2 and the inductor Parasitic capacitance between lines L1 to L4.

As described above, the present invention uses an in-cell touch sensor technology for a display device to divide a common electrode for applying a common voltage to a pixel into a sensor for a plurality of touch sensors, and by connecting to The sensor's sensor line provides a common voltage and touch drive signal to the touch sensor. Embodiments herein contemplate connecting a sensor line during a display drive period, applying a common voltage to both ends of the sensor line once the touch sensor is shorted, and insulating the sensor line during a touch sensor drive period . Therefore, the touch sensing device aligns the common voltage applied to the pixels in the display device including the in-cell touch sensor.

According to embodiments herein, an AC signal having the same phase as the touch drive signal can be provided to the signal line connected to the pixel during the touch sensor drive period to minimize parasitic capacitance connected to the touch sensor. Therefore, the touch sensing device of the present invention can minimize the parasitic capacitance of the touch sensor.

The display device can realize a larger screen with an in-cell touch sensor and a higher touch by making the common voltage of the pixels connected to the in-cell touch sensor uniform and minimizing the parasitic capacitance of the touch sensor. Control screen resolution.

Although the embodiments have been described with reference to the embodiments of the present invention, it will be understood that Inside. In particular, various changes and modifications can be made in the components and/or arrangements of the subject combination arrangements in the scope of the disclosure and the scope of the appended claims. Alternative uses will be apparent to those skilled in the art, in addition to variations and modifications in the component parts and/or configuration.

The present application claims priority to Japanese Patent Application No. 10-2014-0050727, filed on Jan. 28, 2014, and to The contents are incorporated herein by reference.

101‧‧‧Substrate

102‧‧‧Pixel Array

C1~C4‧‧‧ sensor

D1‧‧‧ Feeding line

D2‧‧‧feed control line

FPC‧‧‧Flexible Printed Circuit

IC‧‧‧ integrated circuit

L1~L4‧‧‧ sensor line

T1‧‧‧TFT

Ten‧‧‧ voltage

Vcom‧‧‧Common voltage

Claims (23)

  1. A touch sensing device includes: a plurality of signal lines connected to a plurality of pixels of the touch sensing device; a plurality of sensor lines connected to the plurality of touch sensors of the touch sensing device; and a first feed a unit that applies a common voltage to a first end of the sensor lines during a display drive period and provides a touch drive signal to the sensor lines during a touch sensor drive period The first end; and a second feeding unit that applies the common voltage to a second end of the sensor lines during the display driving period to connect the touch sensors together, wherein the The second feed unit insulates the sensor lines during the touch sensor drive cycle.
  2. The touch sensing device of claim 1, wherein the second feeding unit comprises a plurality of thin film transistors (TFTs), each of the thin film transistors having a source, a drain, and a gate. The source is coupled to one of the sensor lines, the drain is coupled to a feed line, and the gate is coupled to a feed control line, and wherein during the display drive period, the TFT is higher than the TFT A gate high voltage of one of the threshold voltages is applied to the feed control line, and the common voltage is applied to the feed line, and the TFTs are turned on in response to the gate high voltage during the display drive period to A sensor line is connected to the feed line.
  3. The touch sensing device of claim 2, wherein the feed control line and the feed line are in a high impedance state during the touch sensor drive period.
  4. The touch sensing device of claim 2, wherein a gate low voltage lower than the threshold voltage of the TFTs is applied to the feed control line during the touch sensor driving period, and The feed line is in a high impedance state during the touch sensor drive cycle.
  5. According to the touch sensing device of claim 2, wherein the touch driving signal is An alternating current (AC) signal having the same phase is supplied to the feed control line and the feed line during the touch sensor drive period.
  6. The touch sensing device of claim 5, wherein a data voltage for writing an input image data to the pixels and a gate pulse are applied to the signals during the display driving period. The line, and the AC signal having the same phase as the touch drive signal, is supplied to the signal lines during the touch sensor drive period.
  7. According to the touch sensing device of claim 6, wherein the touch sensors are a plurality of self-capacitive touch sensors, and the voltage of the AC signal is equal to the voltage of the touch driving signal.
  8. The touch sensing device of claim 7, wherein each of the pixels comprises a pixel TFT, and a voltage of the touch driving signal and a voltage of the AC signal are lower than a threshold voltage of the pixel TFT. .
  9. According to the touch sensing device of claim 6, wherein the touch sensors are a plurality of mutual capacitance type touch sensors, each of which includes a plurality of transmissions (Tx) a plurality of stripe receiving (Rx) lines crossing the Tx lines, and mutual capacitances existing between the Tx lines and the Rx lines, and wherein the AC signals having the same phase as the touch driving signals are The touch sensor is supplied to the Rx lines during a drive period.
  10. The touch sensing device of claim 9, wherein the touch driving signal has a higher voltage than the AC signal applied to the signal lines and the Rx lines.
  11. A driving method of a touch sensing device, comprising: a plurality of signal lines connected to a plurality of pixels; and a plurality of sensor lines connected to the plurality of touch sensors, the method comprising: driving in a display period During the period, the sensor lines are connected to apply a common voltage to the sensor lines through one end and the other end of the sensor lines; The sensor lines are insulated during a touch sensor drive period and a touch drive signal is provided to the sensor lines.
  12. A touch sensing device includes: a plurality of touch sensors formed in a row, the plurality of touch sensors including a first touch sensor and being formed under the first touch sensor in the column a first touch sensor coupled to the first touch sensor, the first sensor line having a first length and including a first end and a second end; a second sensor line coupled to the second touch sensor, the second sensor line having a second length, the second length being substantially the same as the first length of the first sensor line, The second sensor line includes a first end and a second end; a first component configured to provide a reference signal to the first end of the first sensor line and during the display driving period a first end of the second sensor line; and a second component coupled to the second end of the first sensor line and the second end of the second sensor line, the second component being configured Providing the reference signal to the first sensor line during the display drive period A second end and the second end of the second line sensor.
  13. According to the touch sensing device of claim 12, the first sensor line includes a first portion and a second portion, and the first portion of the first sensor line includes a first touch a connection point of the inductor and the first end of the first sensor line coupled to the first component, and the second portion includes the connection point connected to the first touch sensor and coupled to a second end of the first sensor line of the second component; and wherein the second sensor line includes a first portion and a second portion, the first portion of the second sensor line including the first portion a connection point of the touch sensor and the first end of the second sensor line coupled to the first component, and the second portion includes the connection point connected to the second touch sensor and The second end of the second sensor line coupled to the second component; wherein the first portion of the first sensor line is longer than the first portion of the second sensor line, and the first sensor The second portion of the line is greater than the second portion of the second sensor line Section short.
  14. The touch sensing device of claim 12, wherein the first component is further configured to provide a touch driving signal to the first of the first sensor lines during a driving period of the touch sensor And the first end of the second sensor line.
  15. The touch sensing device of claim 14, wherein the second component is further configured to insulate the first sensor line from the second sensor line during the touch sensor drive period.
  16. The touch sensing device of claim 14, wherein the touch driving signal is a multi-level waveform, and the multi-level waveform is rotated from a first level to a second level greater than the first level. Leveling, then switching from the second level to the first level, then switching from the first level to a third level less than the first level, and then from the third level to the third level One level.
  17. The touch sensing device of claim 14, wherein the touch driving signal is a multi-level waveform, and the multi-level waveform is rotated from a first level to a second level greater than the first level. Leveling, then switching from the second level to a third level that is less than the second level and greater than the first level, then transitioning from the third level to the first level, and then from the first Turning a level to a fourth level less than the first level, and then switching from the fourth level to a fifth level greater than the fourth level and less than the first level, and then from the The fifth level is turned to the first level.
  18. The touch sensing device of claim 14, further comprising: a plurality of pixels; a plurality of gate lines coupled to the plurality of pixels, the plurality of gate lines being in the driving period of the touch sensor Receiving an alternating current (AC) signal, the alternating current (AC) signal is in phase with the touch driving signal; and a plurality of data lines coupled to the plurality of pixels, wherein the plurality of data lines are in the driving cycle of the touch sensor The AC signal is also received in phase with the touch drive signal during the period.
  19. The touch sensing device of claim 14, wherein the second component comprises: a first thin film transistor (TFT), the first thin film transistor comprising a first inductor a source of the line, a gate connected to a feed control line, and a drain connected to a feed line; a second TFT including a source connected to the second inductor line, a gate connected to the feed control line, and a drain connected to the feed line; wherein the reference signal is supplied to the feed line during the display drive period; and wherein the first TFT is on the feed line The reference signal is supplied to the first sensor line, and the second TFT supplies the reference signal on the feed line to the second sensor line in response to applying a threshold value than the first TFT and the second TFT A voltage having a large voltage is applied to the gate of the first TFT and the feed control line of the gate of the second TFT.
  20. The touch sensing device of claim 19, wherein the feed control line and the feed line are both in a high impedance state during the touch sensor drive period.
  21. The touch sensing device of claim 19, wherein the feed control line receives a voltage lower than the threshold voltage of the first TFT and the second TFT during a driving period of the touch sensor And the feed line is in a high impedance state.
  22. The touch sensing device of claim 19, wherein the feed control line and the feed line receive an alternating current (AC) signal during the touch sensor drive period, the alternating current (AC) signal and The touch drive signals are in phase.
  23. The touch sensing device of claim 22, wherein each of the pixels comprises a pixel TFT, and a voltage of the touch driving signal and a voltage of the AC signal are lower than a threshold voltage of the pixel TFT. .
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI621052B (en) * 2016-10-04 2018-04-11 禾瑞亞科技股份有限公司 Touch sensitive processing apparatus, electronic system and method thereof for configuring interconnection parameters with touch panel

Families Citing this family (55)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5513933B2 (en) 2009-06-30 2014-06-04 株式会社ジャパンディスプレイ Touch sensor and display device
JP6027903B2 (en) * 2013-01-30 2016-11-16 シナプティクス・ジャパン合同会社 Semiconductor device
TWI609299B (en) * 2013-12-24 2017-12-21 鴻海精密工業股份有限公司 In-cell touch display device
CN104020905B (en) * 2014-05-30 2017-06-16 京东方科技集团股份有限公司 A kind of In-cell touch panel and display device
KR101615813B1 (en) 2014-05-30 2016-05-13 엘지디스플레이 주식회사 Touch sensing apparatus for time division driving type
US9471168B2 (en) * 2014-10-09 2016-10-18 Himax Technologies Ltd. Touch screen, touch sensing device and a method of driving the same
US9910530B2 (en) 2015-02-27 2018-03-06 Panasonic Liquid Crystal Display Co., Ltd. Display panel with touch detection function
US20160253024A1 (en) * 2015-02-27 2016-09-01 Panasonic Liquid Crystal Display Co., Ltd. Display panel with touch detection function
US10055047B2 (en) * 2015-03-26 2018-08-21 Himax Technologies Limited Driver integrated circuit, driving method, and touch display system
US10115339B2 (en) * 2015-03-27 2018-10-30 Apple Inc. Organic light-emitting diode display with gate pulse modulation
CN104965622B (en) * 2015-04-01 2018-09-28 上海天马微电子有限公司 Array substrate and display panel
US9939972B2 (en) 2015-04-06 2018-04-10 Synaptics Incorporated Matrix sensor with via routing
CN104834123A (en) * 2015-05-26 2015-08-12 深圳市华星光电技术有限公司 Touch control display device and control method and circuit thereof
US9671915B2 (en) 2015-06-30 2017-06-06 Synaptics Incorporated Avoidance of bending effects in a touch sensor device
CN105094479B (en) * 2015-06-30 2018-05-01 京东方科技集团股份有限公司 Touch-control display panel, preparation method, driving method and display device
US9811223B2 (en) * 2015-07-24 2017-11-07 Solomon Systech Limited Method and apparatus for enhancing touch sensing in a display panel
TWI621976B (en) * 2015-07-24 2018-04-21 瑞鼎科技股份有限公司 In-cell touch panel driving method
KR20170015602A (en) * 2015-07-29 2017-02-09 엘지디스플레이 주식회사 Display device
KR101719418B1 (en) * 2015-07-30 2017-03-24 엘지디스플레이 주식회사 Touch sensor integrated type display device and driving method of the same
CN105093721B (en) * 2015-08-10 2018-03-13 上海天马微电子有限公司 A kind of touch display substrate, electronic equipment and driving method
CN105093722B (en) * 2015-08-10 2018-07-31 上海天马微电子有限公司 A kind of touch display substrate, electronic equipment and driving method
KR20170019170A (en) * 2015-08-11 2017-02-21 주식회사 동부하이텍 A Touch sensor, a display apparatus including the same, and a method of sensing a touch panel
US20170052614A1 (en) * 2015-08-19 2017-02-23 Novatek Microelectronics Corp. Driving circuit and a method for driving a display panel having a touch panel
JP6469233B2 (en) * 2015-08-21 2019-02-13 シャープ株式会社 Display device
US9971463B2 (en) 2015-09-29 2018-05-15 Synaptics Incorporated Row-based sensing on matrix pad sensors
KR20170039053A (en) * 2015-09-30 2017-04-10 엘지디스플레이 주식회사 Display device and driving method of the same
JP6503275B2 (en) * 2015-10-09 2019-04-17 株式会社ジャパンディスプレイ Sensor and display device with sensor
EP3159777A1 (en) 2015-10-20 2017-04-26 LG Display Co., Ltd. Method and circuit for driving touch sensors and display device using the same
TW201715357A (en) * 2015-10-26 2017-05-01 晨星半導體股份有限公司 Touch display panel and associated driving circuit and driving method
CN105278194B (en) * 2015-11-24 2019-06-07 京东方科技集团股份有限公司 A kind of array substrate and preparation method thereof, display device and its control method
CN106814900A (en) * 2015-11-30 2017-06-09 晨星半导体股份有限公司 The drive circuit and driving method of touch-control display panel and correlation
CN105677076B (en) * 2015-12-28 2018-09-25 上海天马微电子有限公司 Touch control display apparatus, touch-control display panel and array substrate
US9983721B2 (en) 2015-12-31 2018-05-29 Synaptics Incorporated Optimizing pixel settling in an integrated display and capacitive sensing device
JP6606196B2 (en) * 2016-01-20 2019-11-13 シャープ株式会社 Touch panel integrated display device
WO2017125828A1 (en) 2016-01-20 2017-07-27 Semiconductor Energy Laboratory Co., Ltd. Input device, input/output device, and data processing device
CN105549792B (en) * 2016-02-05 2019-02-12 上海天马微电子有限公司 Array substrate and display panel
JPWO2017138469A1 (en) * 2016-02-10 2018-10-25 シャープ株式会社 Active matrix substrate and display panel
CN105652498A (en) * 2016-03-22 2016-06-08 上海中航光电子有限公司 Array substrate, touch display panel and touch display device
US9836173B2 (en) 2016-03-30 2017-12-05 Synaptics Incorporated Optimizing pixel settling in an integrated display and capacitive sensing device
CN105955522B (en) * 2016-04-20 2018-12-07 厦门天马微电子有限公司 Touch control display apparatus and its driving method
CN105975129B (en) * 2016-05-04 2018-08-28 厦门天马微电子有限公司 Display panel and its test method, application method
TWI584177B (en) * 2016-05-25 2017-05-21 Hon Hai Prec Ind Co Ltd Touch panel and display device
KR20170136049A (en) 2016-05-30 2017-12-11 엘지디스플레이 주식회사 Mirror display
JP2018004886A (en) * 2016-06-30 2018-01-11 シナプティクス・ジャパン合同会社 Display control, touch control device, and display-touch detection panel unit
KR20180003738A (en) * 2016-06-30 2018-01-10 엘지디스플레이 주식회사 Method and circuit for driving touch sensor and display device using the same
KR20180024904A (en) * 2016-08-31 2018-03-08 엘지디스플레이 주식회사 Touch display device and method of driving the same
US9959828B2 (en) * 2016-08-31 2018-05-01 Solomon Systech Limited Method and apparatus for driving display panels during display-off periods
KR20180029721A (en) 2016-09-13 2018-03-21 엘지디스플레이 주식회사 Thin film transistor substrate and display device including the same
KR20180036895A (en) * 2016-09-30 2018-04-10 엘지디스플레이 주식회사 Display Device Having Touch Sensor
KR20180047153A (en) * 2016-10-31 2018-05-10 엘지디스플레이 주식회사 In-cell touch display device
KR20180049349A (en) * 2016-10-31 2018-05-11 엘지디스플레이 주식회사 Touch-Type Display Panel and Short-Repair Method thereof
KR20180061883A (en) * 2016-11-30 2018-06-08 엘지디스플레이 주식회사 Display panel
TWI611332B (en) * 2017-01-06 2018-01-11 友達光電股份有限公司 Touch display panel
CN107193417A (en) 2017-05-24 2017-09-22 上海天马微电子有限公司 Touching display screen and display device
CN107132685A (en) * 2017-06-23 2017-09-05 厦门天马微电子有限公司 A kind of display base plate, display panel and display device

Family Cites Families (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6457819A (en) * 1987-08-27 1989-03-06 Seiko Epson Corp Low noise output drive circuit
JP3518854B2 (en) * 1999-02-24 2004-04-12 キヤノン株式会社 Method for manufacturing electron source and image forming apparatus, and apparatus for manufacturing them
JP2003032085A (en) * 2001-07-12 2003-01-31 Mitsubishi Electric Corp Composite output circuit
JP2006127074A (en) * 2004-10-28 2006-05-18 Fujitsu Ltd Resistance film-type coordinate input device
CN1959799A (en) * 2006-10-30 2007-05-09 友达光电股份有限公司 Display, and display faceplate
US8040326B2 (en) * 2007-06-13 2011-10-18 Apple Inc. Integrated in-plane switching display and touch sensor
US8217913B2 (en) * 2009-02-02 2012-07-10 Apple Inc. Integrated touch screen
US8507811B2 (en) * 2009-02-02 2013-08-13 Apple Inc. Touch sensor panels with reduced static capacitance
TWI431362B (en) * 2009-05-29 2014-03-21 Japan Display West Inc Touch sensor, display and electronic device
US8390582B2 (en) * 2009-08-25 2013-03-05 Apple Inc. Integrated touch screen
WO2011035485A1 (en) * 2009-09-27 2011-03-31 智点科技有限公司 Touch control display able to remove touch control impact on display
JP5839173B2 (en) * 2010-10-14 2016-01-06 Nltテクノロジー株式会社 Touch sensor device and electronic device
KR101755601B1 (en) * 2010-11-04 2017-07-10 삼성디스플레이 주식회사 Liquid Crystal Display integrated Touch Screen Panel
US8593450B2 (en) * 2010-12-22 2013-11-26 Apple Inc. Relay driving of conductive segments in displays
US8804056B2 (en) * 2010-12-22 2014-08-12 Apple Inc. Integrated touch screens
KR101503103B1 (en) * 2011-03-25 2015-03-17 엘지디스플레이 주식회사 Touch sensor integrated type display and driving method therefrom
US9195331B2 (en) * 2011-12-06 2015-11-24 Apple Inc. Common electrode connections in integrated touch screens
US8994673B2 (en) * 2011-12-09 2015-03-31 Lg Display Co., Ltd. Display device with integrated touch screen having electrical connections provided in inactive regions of display panel
KR101524449B1 (en) * 2011-12-22 2015-06-02 엘지디스플레이 주식회사 Liquid crystal display device and Method for manufacturing the same
JP6022164B2 (en) * 2012-01-24 2016-11-09 株式会社ジャパンディスプレイ Liquid crystal display
KR101315227B1 (en) * 2012-05-30 2013-10-07 엘지디스플레이 주식회사 Display device with integrated touch screen and method for driving the same
JP6032794B2 (en) * 2012-06-08 2016-11-30 株式会社ジャパンディスプレイ Liquid crystal display
JP5968275B2 (en) * 2012-08-07 2016-08-10 株式会社ジャパンディスプレイ Display device with touch sensor and electronic device
US10095358B2 (en) * 2012-08-14 2018-10-09 Synaptics Incorporated Method for driving touch sensor to achieve faster sensor settling
KR101404960B1 (en) * 2012-08-30 2014-06-12 엘지디스플레이 주식회사 Display device with integrated touch screen and method for driving the same
KR101464172B1 (en) * 2012-09-27 2014-11-21 엘지디스플레이 주식회사 Display Device With Integrated Touch Screen
KR101993220B1 (en) * 2012-10-29 2019-06-26 엘지디스플레이 주식회사 Display device with integrated touch screen
KR20140060963A (en) * 2012-11-13 2014-05-21 엘지디스플레이 주식회사 Display device with integrated touch screen
US9766755B2 (en) * 2012-11-16 2017-09-19 Lg Display Co., Ltd. Touch sensing system adjusting voltage of driving signal based on a distance from a touch sensing circuit and method for driving the same
KR101700842B1 (en) * 2012-12-07 2017-02-01 엘지디스플레이 주식회사 Display Device and Method for touch sencing of the same
KR101614057B1 (en) * 2012-12-07 2016-04-20 엘지디스플레이 주식회사 Display Device and Method for touch sensing of the same
KR102023436B1 (en) * 2013-01-30 2019-09-20 엘지디스플레이 주식회사 Apparatus for display including touch electrode
KR101555967B1 (en) * 2013-02-22 2015-09-25 엘지디스플레이 주식회사 Display device integrated with touch screen and method of driving the same
US9310917B2 (en) * 2013-03-15 2016-04-12 Apple Inc. Dynamic cross-talk mitigation for integrated touch screens
CN103197796A (en) * 2013-03-29 2013-07-10 京东方科技集团股份有限公司 Touch display device and driving method thereof
JP5729621B2 (en) * 2013-10-07 2015-06-03 Nltテクノロジー株式会社 Surface display device and electronic device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI621052B (en) * 2016-10-04 2018-04-11 禾瑞亞科技股份有限公司 Touch sensitive processing apparatus, electronic system and method thereof for configuring interconnection parameters with touch panel

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